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Hi
This was not easy to process compared to my usual black sky/dso images and it needs way more data I feel. I started out with 300s subs but my guiding was unusually good so I went for 600s. Definitely a narrowband target.
19x600+8x300

Moving the mirror up the tube, by replacing the mirror cell screws with longer ones and using threaded spacers, is also an option. It's reversible. No hacksaw required, just a bit of nerve to dismantle the mirror cell.